Background: Nurses are the most valuable assets of the health care institutions. Hence, it becomes imperative to study the factors that positively affect the nurses' improvement. Organizational identification helps nurses to flourish to achieve their tasks efficiently. Contradictory factor like organizational cynicism serves as force that oppose the optimal effectiveness of nurse performance.  Design: A correlational research design.  Setting: The study was conducted in selected units at Menoufia University Hospital. Sample: Staff nurses who had at least one year of experience working in the hospital and accepted to participate in the study. Data collection Instruments: Instrument one: Organizational identification scale, instrument two: Organizational cynicism scale, instrument three: The Individual Work Performance Questionnaire. Results: Nearly two third of the studied staff nurses at Menoufia University Hospital had high level of organizational identification. While nearly half of the studied staff nurses had low level of organizational cynicism. Moreover, more than half of the studied staff nurses had high level of job performance. Conclusion: There was a positive effect of organizational identification on total job performance and negative relation between organizational cynicism and total job performance. Recommendations: Conduct effective communication and promote cooperation among all staff nurses, leaders, and management, to prevent organizational cynicism. Improve the work environment to stimulate higher organizational identification and lower organizational cynicism.